Answers

It is not possible to retrieve the complete product key from an existing Office installation. You can only discover the last five characters of the 25-character product key that was used to install Office on a particular PC.

(We only show you the last five characters of the product key for security reasons so that it’s not easy for an unauthorized person to discover your product key)

Refer to the article shared by J.B.Patnaik above to find your product key. If you still cannot find it, you might want to contact the Customer Service directly. Microsoft support may be able replace your product key or provide other options:

It is not possible to retrieve the complete product key from an existing Office installation. You can only discover the last five characters of the 25-character product key that was used to install Office on a particular PC.

(We only show you the last five characters of the product key for security reasons so that it’s not easy for an unauthorized person to discover your product key)

Refer to the article shared by J.B.Patnaik above to find your product key. If you still cannot find it, you might want to contact the Customer Service directly. Microsoft support may be able replace your product key or provide other options: